Let’s solve each addition problem step by step. We’ll add the two numbers in each question carefully.
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Problem 1: 20 + 10
20 plus 10 is 30.
✔ Check: 2 tens + 1 ten = 3 tens → 30
Problem 2: 19 + 21
19 + 21 → Think: 19 + 1 = 20, then 20 + 20 = 40
✔ Or: 10+20=30, 9+1=10 → 30+10=40
Problem 3: 11 + 15
11 + 15 → 10+10=20, 1+5=6 → 20+6=26
✔ Or count up: 11, 12… to 26
Problem 4: 15 + 12
15 + 12 → 15 + 10 = 25, then +2 = 27
✔ Or: 10+10=20, 5+2=7 → 27
Problem 5: 18 + 13
18 + 13 → 18 + 10 = 28, then +3 = 31
✔ Or: 10+10=20, 8+3=11 → 20+11=31
Problem 6: 35 + 25
35 + 25 → 30+20=50, 5+5=10 → 50+10=60
✔ Easy! Both end in 5 → makes a clean 10
Problem 7: 14 + 24
14 + 24 → 10+20=30, 4+4=8 → 38
✔ Or: 14 + 20 = 34, +4 = 38
Problem 8: 33 + 62
33 + 62 → 30+60=90, 3+2=5 → 95
✔ Straightforward — no carrying needed
Problem 9: 37 + 26
37 + 26 → 30+20=50, 7+6=13 → 50+13=63
✔ Or: 37 + 20 = 57, +6 = 63
Problem 10: 23 + 46
23 + 46 → 20+40=60, 3+6=9 → 69
✔ No carry-over here
Problem 11: 55 + 30
55 + 30 → Just add 3 tens to 55 → 85
✔ 50+30=80, +5=85
Problem 12: 16 + 43
16 + 43 → 10+40=50, 6+3=9 → 59
✔ Or: 16 + 40 = 56, +3 = 59
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All answers checked and verified.
Final Answer:
1. 30
2. 40
3. 26
4. 27
5. 31
6. 60
7. 38
8. 95
9. 63
10. 69
11. 85
12. 59
Parent Tip: Review the logic above to help your child master the concept of free printable math worksheet.
